[問題] 想請問一下這行程式碼 謝謝
開發平台(Platform): (Ex: VC++, GCC, Linux, ...)
c++
額外使用到的函數庫(Library Used): (Ex: OpenGL, ...)
opencv
問題(Question)：
想請問一下其中某行的意思
for(int i = 0, j = row.cols-1; j > i; i++, j--)
{
if(leftPos == -1 && _mask[i] != 0) // hit left
{
leftPos = i;
bool decrement = (_row[i+1] - _row[i]) > 0;
// find similar value from right
uchar diff = _row[leftPos];
for(int p = (rightPos == -1) ? j : rightPos; p != leftPos; p--)
{
uchar localDiff = std::abs(_row[p] - _row[leftPos]);
if(localDiff < diff)
{
//if(decrement ^ ((_row[p-1] - _row[p]) > 0)) //
different direction
//continue;
leftPeriodPos = p;
diff = localDiff;
if(diff == 0) // the same value
break;
}
}
}
if(rightPos == -1 && _mask[j] != 0) // hit right
{
rightPos = j;
bool decrement = (_row[j-1] - _row[j]) > 0;
// find similar value from left
uchar diff = _row[rightPos];
for(int p = (leftPos == -1) ? i : leftPos; p != rightPos; p++)
{
uchar localDiff = std::abs(_row[p] - _row[rightPos]);
if(localDiff < diff)
{
//if(decrement ^ ((_row[p+1] - _row[p]) > 0)) //
different direction
// continue;
rightPeriodPos = p;
diff = localDiff;
if(diff == 0) // the same value
break;
}
}
}
}
想請問這一整串裡面的這行
for(int p = (rightPos == -1) ? j : rightPos; p != leftPos; p--)
大概的意思是啥?
謝謝
餵入的資料(Input)：
預期的正確結果(Expected Output)：
錯誤結果(Wrong Output)：
程式碼(Code)：(請善用置底文網頁, 記得排版)
補充說明(Supplement)：
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